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HomeMy WebLinkAboutCC AG PKT 2009-07-13 #NACEIV®A ST'AFF' REP®Rl' DATE: Juiy 13, 2009 TO: Honorable Mayor and City Council THRU: David Carmany, City Manager FROM: Vincent Mastrosimone, Director of Public Works SUBJECT: RECEOVE AIV® FILE TO-iE CONIPLET9®IV ®~ TFiE EAST BEACH SAN® R9®IJRISHNIEIVT PR®JECT SUIVIIViARV ®F RE(~UEST: The City Council is asked to Receive and File the Completion of the East Beach Sand Nourishment Project. ~AC~CC;R®IJfV®: Every year, East Beach loses sand which is caused by the natural wave action reflecting off the Navy Jetty, at a rate of 4,000 to 8,000 cubic yards per year. As a result, East Beach becomes relatively narrow and low, as shown in Figure 1 and can be overtopped by storm waves. At the budget workshop meetings in June 2007, the Public Works Department presented a slide show depicting some of the storm events in the past where waves have flooded the promenade and damaged residences along our coast. As a result of sand transport away from East Beach, the City continues to seek replenishment opportunities for its eroded beach. The City purchases beach fill material when the beach becomes extremely narrow and/or economical purchase opportunities exist. The City recently had the opportunity to partner with the U.S. Army Corps of Engineers on their Stage 12 project. This project periodically nourishes Surfside/Sunset Beaches by dredging and placing approximately 1.8 million cubic yards of sand. Working with the U.S. Army Corps of Engineers project was an opportunity to nourish East Beach in an efficient, streamlined fashion. There was a cost savings by partnering with U.S. Army Corps of Engineers as opposed to doing a similar nourishment project on our own. The source of the beach nourishment material was located offshore and southeast of Anaheim Bay. All engineering design, permitting and inspections were handled by Moffatt & Nichol (M&N). The contractor hired by the United States Army Corps of Engineers was Manson Construction. Manson Construction began mobilizing equipment on site on April 8, 2009 and worked till May 4, 2009, a total of 23 days. Pumping itself began on April 14, 2009 and took Agenda Item Page 2 15 days to complete. Pumping was conducted 24 hours a day, 6 days a week, except on Sundays. Earth moving equipment operated between the hours of 7 am and 7 pm, 6 days a week, except on Sundays. In total, an estimated 74,000 Cubic Yards of dredged material was placed on East Beach from approximately Neptune Avenue to 13th Street. The imported material is redder in color than existing beach sand. The color will fade with sun exposure, but until then, the color difference allows the City to track the movement of beac_ h sand due to wave action. The beach width has increased an additional 100: feet. This newly widened a'nd elevated beach profile will offer improved storm wave and flood protection. The East Beach Sand Nourishment Project is deemed complete and in compliance with the engineered design plans. FIRI~-IVCIAL II~P~-CT: Funds were allocated by City Council for Fiscal Year 07/08 in the amount of $150,000 to conduct engineering design and proceed through the permitting process. Additionally, $1,000,000 was allocated by City Council in Fiscal Year 08/09 to fund the construction costs. The final cost of the Project, including design, inspection, environmental compliance, permitting, construction and state lobbying efforts is $1,182,638.56. Expenses M&N (Design, Permitting & inspection) $ 197,018.74 Bonterra (Environmental Compliance) $ 28,955.82 Lobbying $ 31,664.00 Construction $ 925 000 00 Total $ 1,182,638.56 REC®~EN®e4Tl®~: It is recommended that the City Council East Beach Sand Nourishment Project. Receive and File the Completion of the SUBMI ED BY• Vince Mastrosimone Director of Public Works Attachments: NOTED AND APPROVED: David Carmany City Manager A. East Beach Nourishment Project Acceptance Report by Moffatt & Nichol SiOfF:1TI` ~ 1TCTIOL June 19, 2009 City of Seal Beach City Hall 211 8th Street Seal Beach, CA 90740 Attn: Vince Mastrosimone, Director of Public Works Subj: East Beach Nourishment Project Acceptance Report M&N File: 3874-26 Dear Mr. Mastrosimone: This letter report serves to summarize construction activities related to the beach nourishment project recently concluded on East Beach and to meet the requirements of special condition 10 of the U.S. Army Corps of Engineers (USAGE) permit requiring that apost-discharge report be submitted to the USAGE Los Angeles District's Regulatory Branch. The source of the nourishment material was an area located offshore and southeast of Anaheim Bay as shown in Figure 1. The dredging project was undertaken by the U.S. Army Corps of Engineers (USAGE) as part of its Stage 12 Surfside/Sunset Nourishment Project. In total an estimated 74,000 cubic yards of dredged material were placed on East beach within the engineering design footprint beginning.at Neptune Avenue and extending west to 40 feet east of 13th Street. The contractor hired by USAGE in support of their Stage 12 project was Manson Construction. Manson began mobilizing equipment on site on April 8th 2009. The contractor finished on May 4th and worked a total of 23 days, excluding the number of days required to break down their operating station inside the 10th Street parking lot. Pumping began on Apri114th and occurred over an estimated 15 days and was also conducted at night. Earthmoving equipment was operated on the beach between the hours of 7 a.m. and 7 p.m. 3780 Klroy Airport Way, Suite 600 Long Beach, Cafiiornia 90806 (562) 426-9551 (562) 4247489 ~~s! Figure 1 - ®ffshore Borrow Site In preparing for material placement on the beach, the construction crew used existing beach sand to raise afour-sided diked dredge slurry containment area. The dredge discharge line conveyed the slurry consisting of a mix of approximately 15% solids and 85% seawater into the containment area, This approach allowed the solids to settle, while seawater with very low fines content was returned to the ocean via 4 spillway pipes located through the southern (seaward) dike. The dikes were raised to approximately 20 feet MLLW to protect against any potential encroachment of the slurry material either directly into the ocean or onto the landward side of the beach near shorefront residences. City of Seal Beach •June 19, ?00.9 Page 2 of 1 1 . _,at ~;~' •• . l 1 ~~ 1 .~~ /~ ~ ~ { ,~ s~~r~ .~ ..w, f,. ;' Navjgation ~:, /~ Channel • ._.,~ , T~~W,VYY4 wf +~'ti fKtiW ;::va. a r~~r+ , Z ~_.~~ 1 ~', ~' •~, 2008 Borrowr Site , Scale in Feet ~ ~~-~_ i3l • ..sss w 0 1,500 ' •., 3 y •. ~o~~ City of Seal Beach ,tune 19, ?009 Page3ofl] Figure 2 -Dredge Slurry Containment Area and Perimeter Dikes The dredge'Westport' was stationed to the barge 'Freya' just inside the Anaheim Bay west jetty. The dredged material was pumped through a floating pipeline within Anaheim Bay and then connected on the shore to an 18' pipeline which ran westwazd under the jetty fence and into the containment azea. Dredge cycles extended approximately 3 hours to fill up the Westport's hoppers and 2.5 to 3 hours to empty the holds onto the beach. While the Westport was returning to the borrow site to dredge, two bulldozers spread the material within the project footprint beginning at the landward end of the fill area and working seaward. These dozers also maintained the dikes at high enough elevations to contain the dredge slurry. City of Seal Beacll June 19, 2009 Faje ~ of 11 Figure 3 -Dredge Material Discharge Line and Bulldozer Figure 4- Seawater Spillway Pipes F~ ~~ General Conditions City of Seal Beach June 19, 2009 Page ~ of I l Contractor staff actively engaged in best management practices when viewed by Moffatt & Nichol. The site was fully cordoned off with caution tape and 'do not enter' signs were placed at the perimeter; earthmoving machines were never seen to idle and all persons entering the project site were required to wear a hard hat. In addition, the project manager Mr. Rocky Bolin was highly vigilant in preventing curious members of the public from trespassing on the project site. Manson Construction also displayed great flexibility by relocating pipeline sections from an area of the beach around the end of Dolphin Street to accommodate an upcoming weekend wedding event. Turbidity Turbidity monitoring was conducted daily for the duration of the project. Turbidity was observed to be minimal averaging plumes of approximately 20 to 40 feet offshore and 10 to 30 feet in width, and typically existed for less than half a day. Figure 5 below shows the typical extent of turbidity observed during construction. Figure 5 -Typical Eztent of Project Related Turbidity l~6~ Grunion City of Seal Beach June 19, 2009 Page 6 of 11 Grunion monitoring of the project site and the West Beach control site began on Mazch 10th in accordance with the Grunion Protection Plan approved by the California Department of Fish and Game and the California Coastal Commission. Only one grunion was observed within the project site prior to nourishment, while strong spawning runs numbering between the hundreds and thousands were observed on West Beach by the San Gabriel river jetty. On the night of Apri127th, approximately 100 grunion with limited spawning activity were observed within 30 feet of the west Anaheim Bay jetty but outside the project site. Most recently, monitoring carried out on the last night of tine May full moon run showed grunion were present between the Pier all the way east to the Anaheim Bay Jetty. The run measured 2,367 ft long and light to moderate spawning occurred along beach, becoming heavier within 50 feet of the Anaheim Bay jetty. Beach nourishment activities have had an immediate beneficial effect on East Beach as a grunion spawning area. This is most likely due to the flattened slope of the beach from the project. Grunion monitoring will continue throughout May and June 2009 after which a post monitoring report will be submitted to the permitting agencies and the City. Grain Size Comparison Samples of incoming dredged material were taken from the project site on 4/14, 4/15 and 4/22 and analyzed for comparison with native beach material. The analysis showed that the new material is mainly within the preferred grain size range envelope, with some on the coarser side, is very compatible with native material, and is highly desirable nourishment material. These results are shown in Figure 6. Gradation of East Beach and Offshore Sand Source 100% so% 80% 70% ~ 60% a 50% C 40% d d a 30% 20% 10% Q% 10 0.5 0.3 Grain Size (mm) U.S. Standvd Slave Size a' ~ Ne~~®= No. fO - ~5 ` No. 25 Na. 80 No. 720 No.200 ~'~N~~C~z4 (SBD) I 1 1 1 1 I ," •~( ~ ,• ' 1 11 I I I 1 1 ~- I I 1 1 Y X 1 1 1 ' •• ~ 1 1 1 1 I ~ ~°Na6Ve ~•!6 (SBD) 1 1 1 1 ; I I I I I ° I I ~ 1 1 --* ~' 1~ I I I I I I I I 1 1 1 l i p i i i I I I I 1 1 1 1 1 i 1 i i i •''11 1 1 I 1 1 1 I i i I l ' . ~, f/R {~' r ~ / ~i.~~ ~ i I I i t I I i I l l i i I I ~- °-6 R Neptune 1 1 1 i i i ~ i 1 1 1 I 1 i i 1'4 I 1 ii;w~ r; i /r R i i I i i I i ~~~~+6(2006) I I I 1 1 1 I I I 1~ I I' 1 / J ~: /R ' 1 1 1 1 I 1 I 1 1 1 I I I I I I I I , I I I 1 I ;;~ , rY ••. • I I I I I 1 4_14 09 Dredged I l t 1 1 1 I I 1 I I I I I I , I 11'' %%•'1 ~' ~ 1 ICI I I 1 1 1 I 1 I I I 1 1 1 1 °~ R /,: I I '' ~ I 11 I I 1 ~`°"` 4_15 09 Dredged 1 1 1 I 1 1 I ~ I : 1 R 1 I 111 I I I I I 1 1 1 I I I 1 I I I I I ~ ~ ~ I ' '/ ' ~{ 1 +(••. i L 1 1 1 1 1 1 1 1 1 I I I 1 1 1 I 1 ~'4 ~~ Dredged ! 1 1 1 I 1 1 ; t 1 t r 1 1 1 1 I L~ R, • I ', ' 1 11 I 1 1 1 1 1 1 1 I 1 I 1 I 1 I r 11 1 1 I 1 I 1 1 1 I I I 1 I 1 ~ I y! r i ' I I I I I I I I I I I I I I I ~ I I 1 1 1 1 1 1 ; I I I I f I 0 Ri I I 11 I 1 I 1 1 1 1 1 Native Beach Sand Grain I 1 I i r O1 A '' i 1 ~ I l 1 1 1 ~ 1 I I I I 1 I 1 I ~ ~ ~ C- ~ S¢e c! 1YeiO~e (~'1~' 1 1 I 1 1. ~ I i i i - I I 1 I I I I I I I I (1997/98 Sarrlpie$) I 1 1 1 1 1 1 I I .~' ri O !1 i'i 1 1! i 1 i 1 1 I 1 I 1 I I 1 1 I I I I tR R H '%R 1 I I I ..'~L Native B ca l I Sand Gfain I • I A I I I 1 I . 1 6 ' 1 1 1 1 1 I 1 I 1 1 I I I I I ~ ` 1 • I I I I 12e p 1~iOP8 (Q3 ~' 4 ! S I I I i I I I I I I I I 1 1 1 1 I V /. ~ Y~ I 1 1 1 I (1997/8 $ampiea) I I I 1 I I I 1 1 1 1 I IR R. 'Q ! ~' 1 1 I I I I I 1 1 1 1 I I I 1 1 I ~ I f 1 1 I 1 1 1 1 1 1 I 1 1 1 1 1 0 ~ '}% • 1 " I I I. I I I I I I I 1 I I I 1 I I I I I I I I I ~ (L ~ 1 1 I I 1 1 I I 3~ f ^T 1 1 1 I 0.1 i_~ 0.01 1[+'igure 6 - 2009 -Gradation of East Beach and ®ffshore Sand Source ii~9 City of Seal Beach June 19, 2009 Page 7 of 11 Gradation analyses indicated that sands comprised 98.5% of samples, while silt and clay comprised 1.2%, with the remaining 0.3% made up of small shell fragments or gravel. The design profile called for the nourished beach to be graded to an elevation not to exceed +15 feet MLLW with a 10:1 slope on the seaward side. Preliminary post construction surveying done on May 4th indicate that the new beach profile averaged +14 feet MLLW, with some areas slightly higher and other areas slightly lower in elevation. Overall, the intent of the design was met with the completed beach configuration. Lost Spillway Pipes On Apri122 a particularly high southern swell combined with a 5.4 high tide eroded the seaward containment dike. Three of the four spillway pipes draining water from the containment area were mobilized. Replacement pipes were brought in immediately to maintain project progress. Manson Construction made diligent efforts to locate the lost pipes at low tide on several subsequent occasions, but none were found. The pipes are polyethylene segments that are 18" in diameter and measuring 50 feet in length. They may be filled with sand and have been buried on the sea floor. The City should contact Chuck Mesa of the USACE should at (213) 452-3678 should the pipes resurface. Manson Construction will return to retrieve and remove them upon notification by the USACE. Public Response Periodic enquiries were made by members of the public to Manson Construction and Moffatt & Nichol staffregarding the project aim and methodology. Staff members took the time to address all queries politely and informatively. On the afternoon of April 21, Victor Juan of the South Coast Air Quality Management District amved at the project site to investigate a complaint the District had received regarding a bad outfall odor. Upon being briefed by Tonia McMahon of Moffatt & Nichol about the project and invited to tour the site, Mr. Juan declared that no odor was evident and arranged to return the following day, April 22 to further investigate. He toured the site on Apri122 with Ms. McMahon and once again did not experience any malodoressness and no further action was required. Beach Profiles Beach profiles were recorded at historic profile locations of the USACE to document the before and after project conditions. The data are attached to this letter in a letter report from the surveyor. Results indicate the beach widened by approximately 100 feet on the level berm surface, and between 53 and 60 feet at mean sea level within the fill footprint. This is consistent with the intent of the project and is considered a successful result. City of Seal Beach June ] 9, 2009 Page 8 of 11 Figure 7- Beachfill Slope Post-Nourishment, Easterly View Figure 8 -Project Site Post-Nourishment -Westerly View City of Seal Beach June 19, 2009 Page 9 of 11 Conclusion and Project Acceptance The East Beach project is deemed to be in compliance with the project intent and engineering design plans. The construction is acceptable and should be considered complete. The beach width has markedly increased and its distinct pre-nourishment crescent shape is less pronounced from the project, as shown by a comparison between the 2002 aerial in Figure 9 and the May 2009 aerial shown in Figure 10. The imported material is notably redder in color than the existing beach material. However, this color is expected to fade after sufficient exposure to sunlight and should eventually blend in with the native beach material. Some slight color tone in the material may facilitate tracking of its movement along the beach over time that can be used as information for future sand backpassing. This nourishment project has widened the beach between Neptune Avenue and 13th Street. This reach of beach is most impacted by sand loss from the aggressive local wave climate. In addition, this widened and elevated beach will offer improved storm wave protection to shorefront residences, as well as increased area recreational activities. City of Seal Beach lifeguard staff should be commended for their assistance in safeguarding members of the public and ensuring that the project site was patrolled with regularity. The Manson Construction team also brought a distinct professionalism and cooperative approach to all their tasks. We appreciate the opportunity to assist the City on this important project. Please contact us with any questions or comments. Sincerely, M®FFATT & 1vICH®L Chris Webb Senior Coastal Scientist CC: Mr. Fernie Sy, California Coastal Commission Ms. Cori Farrar, USAGE Los Angeles, Regulatory Division Mr. Adam Fisher, Regional Water Quality Control Board or~~ City c:rf'S~:~il 13c;arh .Ellllt; I ~. ry(l~9 Figure 9 - 2002 -View of fast Bcach, Pier and Portion of West Beach ~~~~ C;iL~~ c~1'S~at t3c:aclt .f'ac;% 1 1 c~ F f l Figure 10 - 2009 -View of Past Beach, Post Nourishment (talcen 5/6/09) ATTACHiVIENT E~4ST EEACI-I EE~4CH PROFILE SUR!/EY LETTER REPORT C®ASTAL FRONTIERS C®RP®I~TI®N C®ASTAL ~'R®NTIER,S May 22, 2009 CFC-785-09 M&N Job# 3874-26 Mr. Chris Webb Senior Coastal Scientist Moffatt & Nichol 3780 Kilroy Airport Way, Suite 600 Long Beach, CA 90806 Subject: East Beach Pre- and Post-Nourishment Survey Program -City of Seal Beach This letter report presents the methods and results of the East Beach Pre- and Post- Nourishment Survey Program undertaken in the City of Seal Beach. The purpose of the program was to document the shoreline changes resulting from the placement of approximately 74,000 cy of material on East Beach from Neptune Avenue to just southeast of 13~' Street. The material was placed on the beach between April 7 and May 4, 2009 (Webb, 2009). As part of the program, wading depth beach profile surveys were conducted prior to and following the nourishment activities. The sections that follow provide an overview of the monitoring program, describe the survey activities, and present the results. Beach profile plots accompany this report in Attachment A. The vertical datum used throughout this report is National Ocean Service (NOS) Mean Lower Low Water (1VII.,LW) for the 1983-2001 Epoch. Horizontal positions are given in U.S. Survey Feet relative to California State Plane Zone 6, NAD 83. ®verview The monitoring program is comprised of wading depth beach profile surveys conducted at three transects located within and adjacent to the nourishment site (Figure 1). Transect OC-10, located at the end of Dolphin Ave., is a historical transect that was first established as part of the USAGE Coast of California -Orange County Survey. Transects SB-14 and SB-13 were established specifically for the current monitoring program and are located at the ends of 14~' St. and 13~' St., respectively. Beach Profile Survey The Pre-Nourishment survey was conducted on April 6, 2009, approximately one day prior to the placement of material on the beach. The Post-Nourishment survey was conducted on May 6, 2009, approximately two days after the nourishment operations were completed. The data acquisition and reduction methods were comparable to those employed on previous survey programs conducted on behalf of Moffatt & Nichol and are summarized below. Coastal Frontiers Corporation 9420 Topanga Canyon Blvd, Suite 101 Cl:atsworth, CA 9I31I-5759 (818) 34I-8133 Fax (818) 341-4498 Mr. Chris Webb May 22, 2009 Page 2 Survey Control Control for the surveys was obtained using the USACE monument at Transect OC-10, as well as survey markers chosen at the onshore end of Transects SB-14 and SB-13. The locations of the two survey markers were determined using a GPS receiver with differential corrections obtained in real time from U.S. Coast Guard beacons (DGPS). The elevation of each marker was determined using traditional leveling techniques from the USACE monument at Transect OC-10. Based on past experience, the vertical accuracy of each survey marker is estimated to be ±0.05 ft. According to the GPS equipment specifications, the accuracy of horizontal positions obtained in the manner described above is at least 3.1 ft. Beach Profile Data Acquisition Survey activities were conducted under ideal conditions, with light winds and waves typically less than 3 ft. Data were acquired along each tansect from the landward limit of Figure Z. Location Map Mr. Chris Webb May 22, 2009 Page 3 the sandy beach to wading depth, which typically corresponded to 13-15 ft~~ below Mean Lower Low Water (MLLW) Datum. The beach and surf zone were surveyed using a total station and a survey rodman. The total station was used to determine the position and elevation of the beach at each location occupied by the rodman. Each transect was surveyed from the back beach seaward through the surf zone until the survey rod no longer protruded above the water surface when held erect. Data were collected approximately every 40 ft and at obvious breaks in elevation. Beach Profile Data Reduction The data from the wading survey were processed using software developed by Trimble. The raw total station data were read by the software, and the coordinates and elevation of each data point were calculated and inserted into a CAD drawing. These data were used to create beach profile plots. The electronic total station used to conduct the survey is capable of measuring elevation differences to within ±0.1 ft and ranges to within ±0.5 ft. However, because the swimmer was subjected to waves and currents in the surf zone, the horizontal accuracy perpendicular to each transect (parallel to the shoreline) varied from minimal at short ranges to approximately ±15 ft at the offshore end. Results The beach profile plots developed from the Pre- and Post-Nourishment survey data are provided in Attachment A. The range on each plot represents the distance in feet seaward of the transect origin measured along the transect alignment. The elevation is given in feet relative to MLLW (1983-2001 Epoch). For the purposes of this study, the origin is taken to be the survey monument or survey marker located along each transect. The Pre- and Post-Nourishment beach profile data are included in digital form on an accompanying CD-Rom, which contains a digital copy of this report along with ASCII files of: (1) range and elevation for each profile, and (2) northing, Basting, and elevation triplets (n,e,z) for the entire survey. Elevations are provided in feet relative to MLLW Datum (1983-2001) and geo-referenced positions are given in U.S. Survey Feet relative to California State Plane Zone 6, NAD 83. Observations A detailed analysis of the shoreline changes exceeds the present Scope of Work. General observations are offered, however, based on the profile plots presented in the attachment and the Mean Sea Level (MSL) beach widths shown in the table below. Mr. Chris Webb May 22, 2009 Page 4 Profile Changes Comparison of the Pre- and Post-Nourishment beach profiles (Attachment A) indicates that sand accumulated on the above- and below-water beach at all three beach profile transects. The largest gains were realized at the two transects located within the fill area .(OC-10 and SB-14). Modest gains also were realized at Transect SB-13, and may be attributed to alongshore dispersal of the nourishment material. Beach Widths and Shoreline Changes Pre- and Post-Nourishment Beach Widths: At the time of the April 2009 Pre- Nourishment Survey, MSL beach widths at East Beach ranged from 271 ft at Transects OC-10 and SB-14 to 274 ft at Transect SB-13. Following the nourishment (May 2009), MSL beach widths ranged from 304 ft at Transect SB-13 to 331 ft at Transect OC-10. e Shoreline Chan es (April to May 2009): During the one-month period between the Pre- and Post-Nourishment Surveys, MSL beach widths increased at all three of the East Beach transects. The greatest shoreline advance, 60 ft, occurred at Transect OC-10. The average change was 48 ft. Table 1. 1V1<ean Sea )<,evel Beach Widths MSL Beach Width Beach Width Changes ft "' ft Transect Location Pre-Nourishment Post-Nourishment Apri12009 (April 6, 2009) (May 6, 2009) to Ma 2009 OC-10 Dolphin Ave. 271 331 60 SB-14 14~' St. 271 324 53 SB-13 13`~ St. 274 304 30 ~'~ Derived from profile survey data Mr. Chris Webb May 22, 2009 Page 5 We have sincerely appreciated the opportunity to assist Moffatt and Nichol. Please do not hesitate to contact us if you have any questions or require additional information. Sincerely, Coastal Frontiers Corporation Christopher Scott, P.E. Project Engineer Attachments: (A) Beach Profile Plots Enclosure: Data CD-Rom References Brady Richmond, P.E. Project Engineer Webb, C., 2009, personal communication, Moffatt and Nichol, Long Beach, CA. ~ttach~nt t~ ~~a~h P~®~1~ PIl®t~ Transect OC-10 2D 15 10 5 d~ :~ m w 0 _~ -1D -1b ' ®May 6, 2A09 . np~i.s, 2no9 l Distance Seaward of Transect Origin (Feet) 7ransect SB-14 25 ~----r -r~__r -t- 20 ._... ... ........._._....._._. ........ _........._ .. 1 5 ~......_.. .. ............ .. ... ........... .. v m c 0 ,~ w lL -5 -10 -15t 0 40D 600 6DD 700 Dis#ance Seaward of Transect Origin (Fee#) t3D0 8D0 10D0 Iq Transact SB-13 1 2 1 1 J N ti C lFl -'~ I -ii J ~-- ~~ May G, 2009 ' -~-~ April B, 2009 g ..... ... ... ....... ...... ........ ... ... ..... ... ....,. ..... ...... .. ......... ~ ......... ~isf ~ ' i ...... ....... .... .... .. .,. .. ... .... _...... ...... .._. ,... ......... ......... IUU 4UV JUU 'IUU .7UU OUV /UU {3UU 'J~UU 1VUU Distance Seaward of Transact Origin (Feet] a